The problem was to plan a survey that would cover enough area and atolls to define the region where higher levels of fallout may have occurred, but not ‘s0 extensive and costly that funding could not be obtained. This led to the concept of conducting what may be described as a screening survey, @.g., & survey where results could be used to determine whether or not any further Survey effort was needed. For such a survey there is also the possibility that if any unexpected results are obtained, some modification of the survey plan can be made during the survey. AEC staff reviewed the technical files containing information on all nuclear tests conducted at Bikini and Enewetak Atolls, the available radiological monitoring data, and the meterological information for each test. For the tests with the higher fission yields, and using fallout trajectories developed from the winds for the day of the test, atalis that most likely received close-in fallout were identified by inspection. Lacking radiological measurements in the downwind area that could confirm or deny the presence of fallout for a number of tests and atolls, this was considered the best approach for a screening survey plan. The list of locations that was developed contained 13 islands and atolls (including Bikini and excluding Enewetak). In this were two single islands and eleven atolls with each atoll contained a number of islands. In order to characterize radiological conditions fn the atolls, the larger islands and Sogn TIS